Globulosis García

Short, Andrew Edward Z., García, Mauricio & Girón, Jennifer C., 2017, Revision of the Neotropical water scavenger beetle genus Globulosis García, 2001 (Coleoptera: Hydrophilidae: Acidocerinae), Zootaxa 4232 (2), pp. 271-281 : 273-274

publication ID 10.11646/zootaxa.4232.2.10

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Globulosis García


Genus Globulosis García View in CoL

Globulosis García, 2001: 153 View in CoL

Type species. Globulosis hemisphericus García, 2001 , by original designation.

Differential diagnosis. Small beetles, total body length 1.9–2.3 mm ( Fig. 2 View FIGURE 2 ). Color yellow to dark brown. Body form rounded in dorsal view, and subhemispherical (slightly dorsoventrally compressed). Antennae with eight antennomeres ( Fig. 5 View FIGURE 5 A). Maxillary palps curved inward. Elytra without sutural or other distinct striae. Mesoventrite with a transverse ridge, usually elevated medially into an acute tooth ( Fig. 5 View FIGURE 5 B). Fifth abdominal ventrite with small truncation at apex ( Fig. 6 View FIGURE 6 A).

Description. Head ( Figs. 3 View FIGURE 3 ; 5A). Antennae with eight antennomeres, including three-segmented pubescent club ( Fig. 5 View FIGURE 5 A). Maxillary palps curved inward and long, distinctly longer in length than the width of head just anterior to eyes; inner face of palpomere 2 straight to slightly curved ( Fig. 5 View FIGURE 5 A); apical palpomere slightly longer than penultimate. Labial palps short, distinctly shorter than mentum width. Mentum ( Fig. 5 View FIGURE 5 A) flat and set with a few scattered setae; strongly emarginated anteromedially with a notch extending posteriorly about one-quarter to one-third of its length. Head with ground punctures weakly impressed. Frons ( Fig. 3 View FIGURE 3 ) with series of irregular systematic setiferous punctures anterior to each eye. Systematic punctures also present on clypeus and labrum but blend with ground punctation, appearing almost absent. Eyes ( Fig. 3 View FIGURE 3 ) not bulging, continuous with outline of the head; slightly emarginated anteriorly by a small extension of the frons. Thorax. Pronotum with systematic punctation in lateral thirds, each puncture usually bearing a short seta. Prosternum narrow, not carinate medially ( Fig. 6 View FIGURE 6 B); very slightly elevated in anterior third, and with a transverse crease. Mesoventrite with anapleural sutures distinctly concave ( Fig. 5 View FIGURE 5 B). Mesoventrite with a transverse, triangular ridge medially ( Fig. 5 View FIGURE 5 B). Metaventrite pubescent, with a small indistinct glabrous region posteromedially; with a small posteriorly projecting tooth medially. Elytra without sutural stria or serial punctures ( Fig. 5 View FIGURE 5 C); with irregular rows of systematic punctures bearing short setae, appearing indistinct from surrounding ground punctation. Procoxae set with sparse setae, but without thickened spines ( Fig. 6 View FIGURE 6 B). Hind femora pubescent on all but apical fifth to sixth of ventral face ( Figs. 2 View FIGURE 2 C, F). All tarsi with five tarsomeres; with a few short setae on dorsal face but without long natatory setae. Ventral surface of tarsomeres 1– 4 set with two rows of moderately long articulated spicules. Abdomen. Abdomen with five densely pubescent ventrites, with setae slightly denser medially on each ventrite (6A). Fifth ventrite truncate to very weakly emarginated at apex, and set with a row of coarser yellow setae ( Fig. 6 View FIGURE 6 A). Aedeagus (e.g., Fig. 7 View FIGURE 7 ) with short basal piece, less than one-third the length of the parameres. Median lobe wide, wider than width of parameres.

Larvae. Unknown.

Distribution. Colombia (Meta), Venezuela (Apure, Amazonas, Bolívar), Guyana, Suriname, & Brazil (Amazonas, Pará).

Biology. Recent collecting efforts in Venezuela and Suriname suggest that the genus is primarily found in moving waters, particularly stream margins with detritus. It has been found at elevations from near sea level to 600 m.












Globulosis García

Short, Andrew Edward Z., García, Mauricio & Girón, Jennifer C. 2017

Globulosis García, 2001 : 153

Garcia 2001: 153
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